Add Page slug to the body_class function

wp_body_class.php

// Add to the body_class function
function condensed_body_class($classes) {
    global $post;
 
    // add a class for the name of the page - later might want to remove the auto generated pageid class which isn't very useful
    if( is_page()) {
        $pn = $post->post_name;
        $classes[] = "page-".$pn;
    }
 
    // add a class for the parent page name
    if ( is_page() && $post->post_parent ) {
        $post_parent = get_post($post->post_parent);
        $parentSlug = $post_parent->post_name;
        $classes[] = "parent-".$parentSlug;
    }
 
    // add class for the name of the custom template used (if any)
    $temp = get_page_template();
    if ( $temp != null ) {
        $path = pathinfo($temp);
        $tmp = $path['filename'] . "." . $path['extension'];
        $tn= str_replace(".php", "", $tmp);
        $classes[] = "template-".$tn;
    }
 
    return $classes;
 
}
 
add_filter('body_class', 'condensed_body_class');